c-electric-semi&comma barfs

[Tak Ota]

There is a problem in the new C mode in the head of CVS.  Here is a
simple test case.  In a C mode buffer containing only the following
two functions,

------------------------------
void func1(void)
{
  return;
}

void func2(void)
{
  return;
}
------------------------------

narrow to the `func2' (M-x narrow-to-defun) and delete the `;' after
the keyword `return' and retype it, emacs signals "Wrong type
argument: number-or-marker-p, (18 . 31)".

In function `c-parse-state' an element of `c-state-cache' seems to be
unexpectedly a cons cell instead of an integer.